This is purely trivial & basic curiosity but I would like to know all moves that pikachu learns through the anime please type it out or don't answer if the moves are region specific please state that along with any moves that Pikachu has never forgotten.

The problem with this question is that in the Anime, Pokemon are not limited to just 4 moves like they are in the games. The only way to answer it is to list off all the moves Pikachu has ever used throughout the whole Anime.